In October 1981 a questionnaire (IRG Doc. No. IRG/WP/2166) on the so-called fungus cellar tests in unsterile soil was prepared and despatched to 56 individuals representing various institutes, organisations, or companies. In addition a further 68 letters describing the purpose of the questionnaire were sent to additional IRG members who could request the full questionnaire if appropriate. This represented a contact with 125 individuals in 48 countries. A verbal report on the results of this survey was presented at IRG 13 in Cesme, Turkey. The present document formalises that report.

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